Final answer:
Clara should make the cut right at the skin line to collect a hair sample for forensic analysis, which includes all vital parts of the hair structure. For nails, the area covered by the cuticle at the outside edge is the furthest from the growth center. So the correct option is B.
Step-by-step explanation:
The correct answer to where Clara should cut when asked to take a hair sample is B. Right at the skin line. This area is where the hair follicle is closest to the surface of the skin and will ensure that the most amount of biological material is collected, which is crucial in forensic analysis. When hair is cut at the skin line, it includes all three zones of the hair shaft: the cuticle, cortex, and medulla, providing a complete sample for examination.
Regarding Nail Growth-
Similar to hair, nails are continuously growing. The part of the nail that is furthest from the nail growth center is d. cells covered by a cuticle at the outside edge of the section. This area represents the oldest part of the nail, analogous to the tip of the hair being the oldest part.